难以处理的

With the much application of multimedia technique,video frequency data and audio frequency data need to be processed.

随着多媒体技术的大量应用，需要对视频和音频数据进行处理，由于现实的网络状况难以满足较好的实时视频通讯的要求，因此对音频数据的处理就显得更加重要。

The 4004 found a home in desktop calculators, traffic lights and electronic scales. Despite its power, its 4-bit structure was too small to process all the bits of data at one time to handle all the letters of the alphabet.

尽管4004的运算速度很快，但是4位字节的构造太小，难以同时处理所有数据比特，也不能处理字母表中所有的字母。

Proposed a representation scheme for 3D face -- Surface UnfoldingFor its irregular sampling in 3D space, 3D face surface cannot be processed by many orthogonal and subspace analysis toolkits directly, i.e. DFT, DCT, PCA, LCA. Surface Unfolding projects the 3D face to a 2D plane while retaining its intrinsic geometry properties of angle and area which issues a surface representation — Unfolded Image.

提出了一个三维人脸的平面表征方法——曲面开折模型不同于传统的数字生物特征，3D人脸数据是非规则采样的，传统的信号处理工具难以对3D数据进行直接处理。

Now keyword search over relational database is becoming a hot research topic in both database and IR area. There are two kinds of popular keyword search systems, while neither of them can give accurate results with high speed. The on-line system can obtain the latest search results while the search speed is low; The off-line system speeds the query processing by means of preprocessing, but the disadvantage lies in expensive cost needed to preprocess again once the database is updated.

关系数据库上的关键词检索已成为数据库和信息检索领域的研究热点之一现有数据库关键词检索系统可分为在线和离线两大类，它们都难以兼顾查询效率和效果：在线系统能够获得数据库最新结果，但速度较慢；离线系统使用预处理提高查询速度，但若数据库更新就要重新执行预处理。

Our current labor dispute settlement system can not be suitable to the need of current settlement of labor dispute system because its period of settling the labor dispute is long in actual situation, giving heavy burden to litigant; the function of labor dispute mediation committee is limited, arbitrational system is not complete, tripartite principle exists in name only, there is no relevant evidence system, arbitration and litigation are difficult to link up and so on.

我国目前的劳动争议处理机制不适应现实劳动争议处理需求，造成实践中劳动争议处理周期过长，当事人负担重；在劳动争议的具体解决机制中，劳动争议调解委员会的作用有限，仲裁制度尚未形成完善的体系，三方性原则虚置，举证责任分配不明，仲裁与诉讼难以有效衔接等。

In all the problems in water supply, the remove of Chironomus larva from drinking water has become one of the most important, and it is very difficult to effectively remove by conventional methods.

摇蚊幼虫难以被常规的水处理工艺有效地去除，成为又一困扰水厂正常生产运行的水处理问题。

The invention discloses a disposing method of ammonia nitrogen waste water in the effluent disposal technological domain, which is characterized by the following: sieving heterotrophic nitrobacteria and aerobic denitrobacteria with stronger environment adaptive ability to nitrate and denitrate simultaneously; constructing mud nitrated and denitrated system to dispose waste water with nitrogen simultaneously to satisfy different DO densities.

为了解决同步硝化反硝化过程中菌种来源不明，调控困难，硝化和反硝化对DO浓度要求不同，在实际工程中难以实现同步硝化反硝化，本发明筛选出对环境有较强适应能力的异养硝化细菌和好氧反硝化细菌，采用异养硝化细菌和好氧反硝化细菌构建同步硝化反硝化污泥体系处理含氮废水，具有投资少，费用低，处理效果好，不仅去除废水中的氨氮，而且对总氮也有较高的去除率。

Emerge of polymer automatic steeps drug machine extricates people from manual labor. It's electric control system including PLC and inverter.

在污水处理系统中，由于操作人员难以掌握药剂的配置比例，使处理出来的水质不能达到排放标准。

Nanoflltration has become one of the optimum techniques in treating micro-polluted water with following characters: high option separation property, being able to remove the disinfection by products, weedkiller and pesticide, heavy metal and part of total hardness, low operation pressure, high quality effluent, low energy demand.

目前，常规水处理工艺对微污染水的处理效果较差，而且氯消毒后会产生&三致物质&，难以达到国家饮用水水质标准。

CBR can solve many difficult problems that traditional handling knowledge system can"t solve, for instance, knowledge handling efficiency low outside system "boundary, march conflict, combination explosion, self-learn difficult, complex problem class difficult and train taking long time in artificial nerve net.

CBR系统具有存储积累、快速检索、匹配与改写、学习与归纳等特点，它较好地解决了传统知识处理系统&边界&以外的知识处理效率低下、匹配冲突、组合爆炸、自学习困难、人工神经网络中复杂问题难以分类、训练费时以及数学函数模型结论局限等问题。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。